Alfeed lapointe



(No Model.)

A. LAPOINTE.

PORTABLE SGAPPOLD.

No. 375481; esii'l UNITED STATES PATENT OFFICE.

ALnnnD LAPOINTE, or MONTREAL, QUEBEO, CANADA.

PORTABLE SCAFFOLD.

SPECIPICATION forming pai-toi' Letters Patent No. 374,481, dated December 6, 1887.

Application filed May 7, 1887. Serial No. 237,473. (No model.) Patented in Canada April 16, 1887, No. 20,467.

T0 aZZ whom it may concern:

Be it known that I, ALFRED LArorNTE, of the city of Montreal, in the district of Montreal and Province of Quebec, Canada, have invented certain neW and useful Improvements in Portable Scaffolds, (for Which Letters Patent of Canada, No. 26,467, have already been granted to me on April, 16', 1887;) and I do hereby declare that the following is a full, clear, and exact description of the same.

My invention has reference to appliances for enabling persons to Work outside buildings, and although it is principally intended for the use of servants and others cleaning windows, it may be adapted to form part of a scaffold for painters and others.

The invention consists of a light framing Which can easily be placed in position in a Window-opening and affords a secure outside standing for any one. It may be described as follows: T'Wo main side bars secured together by rods carry on their inner ends sliding vertical bars, on which slide grips or holdfasts, Whichare raised or lowered by screws working through projections from the sockets `on the main side bars to catch on the under side of the inside sill. These main side bars,which can be adj usted to a Wall of any thickness, pass some distance beyond the outside of the wall and carry a small platform or stage, being turned up in rear of it, so as to form a back or railing. In suitable positions on the ontsides of these side bars are formed eyes, through which pass rods With turned over ends, bent up at their extremities, so as to catch onto the under side of the outside sills. In the side bars or attachments to same are also formed th readed openings, through which passcranked pins or bolts, the ends of which rest on the outside sill and form seats for the apparatus.

For full comprehension of .the invention reference mustbe had to the annexed drawings, forming part of this specification, in which- Figure 1 is a side view of the apparatns set in position in a window-opening; Fig. 2, an enlarged sectional longitudinal elevation of same; Fig. 3, a detail top view of socket carrying vertical bars, and Fig. 4 a modification of rods for gripping under side of outside sill. Similar letters of reference indicate like parts.

A A are the side bars forming the frame of the apparatus, of suitable section and length sufficient to allow the apparatus to be used With walls of any thickness, and securcd together by any desired number of rods orbolts' B B. On the inner ends of thesemain side bars, A, slide vertical bars A', formed with sleeves A2, and on these bars slide grips or holdfasts O O, formed with sleeves O' C', and raised or lowered by cranked screw-bolts D D, passin g through threaded holes aeafi, formed in projections from the sleeves A2 of the vertical bars, and connected with the grips O O. The bars A' are secured in place on the eside bars by set-screws a'or other means.

E E are cyes set obliquely and secured on the outside of AAatdesired points. Through these eyes pass loosely the bolts F F, with turneddown ends F/ F' and pointed catches FIL F2, these being intended to give a hold on the under side of the windowsill, as shown in Fig. 1. They are adjusted in position by means of the threaded nuts G G, With handles, Working on the screwed ends ff.

At desired points in the side bars, A, or in projections from or attachments to same, are formed threaded apertures a3 a, through Which pass crankcd screwed pins H H, carrying on their lower endsa flat bosses or plates H' H', Which rest on the Outer window-sills.

K is a platform carried on the outer ends of the bars A A, Which are turned up, as shown at A3 A3, and connected by bolts B' B' to form a railing or safeguard for any one standing upon the platform. Any suitable framing, L, carried from the bars and filled in, if desired, with Wire, being provided at the sides.

The operation of my invention is very simple, as when the apparatus is laid in the window-opening all that is required to fix it in place is, by means of the cranhed bolts D, to raise or lower the grips O O until they hold fast under the edge of the'inner sill, to which they do no damage. The position of' the apparatus is then regulated vertically by means of the cranked bolts H H to bring their ends H' I-I' so that they 'will carry the weight of the device. The bolts F F are then adjusted by means of the screWed nuts G G, and moved either out or in until their bent-up ends F2 F2 grip the under side of the outer sill of the WinlIO dow, thus making the whole apparatus fast in place.

The apparatus may bc made of any Width desired for a Window, and may have in some cases a center bar corresponding to the side bars running up through it. To form a scaffolding for working over the Whole face of a Wall, all that is required to be done is to connect the platforms K K at each Window by boards, the sides L being, if desired, removable,V and ropes or wires run from scaffold to scaffold for safety. In some cases the bolts F F may have their ends slotted and the ends F' F' passed through them, so as to allow of I greater adjustment, as shown in Fig. 4.

XVhat I claim is as follows:

rl he combination, in a portable scaffold, of the following elements: horizontal side bars connected together and carrying on their Outer endsa platform, vertical bars sliding on inner ends of same, grips sliding on Vertical bars engaging With inner sill, and screwed bolts and handles for adjusting height of same, screwed bars set obliquely in main side bars, turned up at their ends to engage With outer sill, and Vertical screwed bolts resting on sill to afi'ord seats for apparatus, all substantially as herein set forth.

ALFRED LAPOINTE. lVitnesses:

OWEN M. EVANs, W. B. McFEA'r. 

